{"id":2748248,"url":"https://alion.io/job/astro-mechanica-mechanical-engineer-fluid-systems","title":"Mechanical Engineer, Fluid Systems","company":{"id":171729,"name":"Astro Mechanica","domain":"astromecha.co","url":"https://alion.io/company/astro-mechanica","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":94,"open_postings":24,"ghost_share":0,"stale_share":0.042,"repost_share":0,"time_to_fill_p50_days":90,"computed_at":"2026-10-25T05:49:26Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"junior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["San Francisco, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":135000,"max":170000,"currency":"USD","period":"year","gross":null,"usd_annual":170000},"salary_estimate":null,"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CATIA","optional":false},{"name":"SolidWorks","optional":false}],"status":"live","first_seen_at":"2026-10-16T21:25:59Z","employer_posted_date":"2026-10-16","last_verified_at":"2026-10-26T00:43:10Z","board_verified":true,"closed_at":null,"days_open":9,"trust":{"level":"ok","repost_count":0,"flags":[],"days_open":8},"description":"ABOUT US:\nAstro Mechanica is a vertically integrated aerospace company developing a scalable technology platform to power critical infrastructure, mission operations, and the future of flight. We apply aerospace engineering and quality standards across our products, delivering high performance, reliability, and efficiency for the most demanding operating environments. Astro Mechanica is backed by leading venture and strategic investors, including Andreessen Horowitz (a16z), Giant Step Capital, United Airlines Ventures, and Voyager Ventures.\nWHO YOU ARE:\nAstro Mechanica is seeking a Mechanical Systems Engineer (Fluid Systems) to own the design, integration, and maturation of critical vehicle fluid systems. The ideal candidate is a hands-on engineer with a passion for owning complex systems from the ground up. You thrive in fast-paced development environments, are comfortable making informed tradeoffs, and take pride in building systems that are robust, maintainable, and performant across the full flight envelope. Your work will directly enable propulsion, actuation, thermal management, and vehicle operability at extreme conditions. You will own one or more subsystems end-to-end, leading them from early concept through detailed design, qualification, and flight test.\nWHAT YOU’LL DO:\nOwn the full lifecycle of one or more vehicle fluid systems, such as fuel, hydraulics, pneumatics, lubrication, or thermal management.\n\nPerform trade studies and first-order analyses (pressure drop, flow sizing, transient behavior, failure modes) to inform design and system architecture decisions.\n\nDesign and integrate components including pumps, valves, accumulators, heat exchangers, plumbing, and sensors, ensuring functionality and manufacturability.\n\nCollaborate closely with propulsion, structures, avionics, controls, and manufacturing teams to ensure seamless system integration.\n\nWork with suppliers to specify, select, and qualify off-the-shelf or custom components.\n\nAssist in developing test plans and participate in validation and verification activities, including component and system-level testing.\n\nProvide hands-on support during prototyping, vehicle builds, ground testing, and flight test campaigns.\n\nLead technical reviews, generate clear documentation, and contribute to safety and hazard analyses.\n\nWHAT WE’RE LOOKING FOR:\nBachelor’s degree in Mechanical Engineering, Aerospace Engineering, or a related field.\n\n2-5+ years of experience designing, integrating, or testing fluid or mechanical systems (internships and student projects count).\n\nStrong understanding of fluid mechanics, thermodynamics, and mechanical system fundamentals.\n\nExperience with system-level thinking: requirements flow-down, interfaces, failure modes, and operational considerations.\n\nProficiency in 3D CAD tools (NX, CATIA V5, SolidWorks, or similar) for routing, packaging, and component design.\n\nHands-on experience with hardware-plumbing, assembly, instrumentation, or testing.\n\nClear communicator who works well across disciplines and can translate analysis into practical design 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